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Fire hydrants and standpipes

Our solutions / Safety of property

Fire hydrants, dry and wet standpipes

maintenance dry standpipes
dry and wet standpipes
dry and wet standpipes and fire hydrants
fire hydrants

Fire hydrants, dry and wet standpipes

ENGIE Axima’s specialized teams can study and analyze your installations in order to propose the best fire protection solution that meets current standards. Our teams are at your disposal to study all types of projects, including dry and wet standpipes , and even fire hydrants.


Dry standpipe


A dry standpipe is a device that allows the fire services to save time when fighting a fire. They are installed in buildings with several floors or basements.

A standpipe is a rigid pipe that passes through the building. Fire hydrants can be connected to each end. Standpipes are a sort of pre-positioned, fixed pipe. One end is in the zone to be protected, and the other end is outdoors.


The regulations applying to fire safety dry standpipes

The exterior inlets must be no more than 3 m from the entrance to the building where the standpipe is located, and less than 60 m from a fire hydrant.

For establishments open to the public

Standpipes are required whenever high-risk premises are installed on the floors of the building, with a floor more than 18 meters above the level of the point of access of the fire services.

This also applies to covered parking lots with at least three levels immediately above or below the reference level. In this case, the dry standpipes are positioned in each stairwell or evacuation chamber.

The installation and maintenance of dry and wetstandpipes

We install and maintain dry and wet standpipes in accordance with the standard NF S 61/759.


Dry standpipes: a valuable tool for fire-fighters

When a fire breaks out in a defended zone, the team tasked with establishing the water supply connects the dry standpipe to the fire truck with a hose. The team of fire-fighters then goes to the floor where the fire is (or the floor immediately below), unroll their hose and connect it to the other end of the dry standpipe. In other words, the dry standpipe acts as a shortcut to supply the water required to put out the fire as quickly as possible.

maintenance of wet standpipes


Wet standpipes


These fixed, rigid and pressurized pipes are intended to facilitate the intervention of the fire-fighters.

Unlike dry standpipes, wet standpipes are pressurized and permanently filled with water by pumps and a water source.

A wet standpipe is similar to a fire hydrant, but inside the building.

They are kept full at all times and are connected to pumps, tanks, booster pumps or any other device that can be used to supply water to the fire-fighters’ hoses.


The advantages of wet standpipes for fire-fighting

The team of fire-fighters can connect its hoses directly on the floor where the fire is. Wet standpipes speed up the maneuvers required before the fire can be extinguished.

fire hydrant


fire hydrants



Fire hydrants are fire-fighting devices installed by the public authorities or private enterprises (industry, establishments open to the public, military bases) on their premises.


The role of fire hydrants

Fire hydrants are connected to an underground or surface water transport network that supplies pressurized water to the fire services. Fire hydrants are made up of pipes with an interior diameter of at least 100 mm.




Installation and maintenance of fire hydrants


Our offer:

  • Layout and dimensioning studies
  • Conformity studies
  • Preparation and follow-up of administrative formalities, conformity reports
  • Earthworks and installation of the hydrants

Our teams perform the compulsory maintenance of fire hydrants, plus all necessary repairs, in accordance with the standard NF S 62-200.

In the winter, the underground drain valve opens when the water valve is completely closed to prevent the water from freezing.